Adjusting mechanism for resawing machines



Feb. 5 1924.

J. SORENSON ADJUSTING MECHANISM FOR RESAWING MACHINES Filed Aug. 9. 1920 3 Sheets-Sheet l v Feb. 5 1924.

11,482,712 J. SORENSON ADJUSTING MECHANISM FOR RESAWING MACHINES Filed Aug. 9, 1920 3 Sheets-Sheet 3 avweukoz gQ MM Feb. 5 1924.

J. SORENSON ADJUSTING MECHANISM FOR RESAWING MACHINES Filed 1920 3 Sheets-Sheet 5 avwcmtoz Patented Feb. 5, 1924.

t ltl.

JOHN SORENS ON, OF RHINIELANDER, WISCONSIN.

ADJUSTING MECHANISM FOR RESAWING MACHINES.

Application filed August 9, 1920. Serial No. 402,185.

To all whom it may concern:

Be it known that I, JOHN SonnNsoN, a citizen of the United States, residing at Rhinelander, county of Oneida, and State of Wisconsin, have invented new and useful Improvements in Adjusting Mechanism for Resawing Machines, of which the following is a specification.-,

My invention relates to improvements in adjusting mechanism for re-sawing ma chines.

The object of this invention is to provide safe and easily controlled means for utilizing machine power to raise and lower the work table and conveyors of a re-sawing machine, the power transmitting connections for making the adjustment being under the control of the operator continu ously during the adjusting operation. Also to provide means whereby movement is controlled in part by locking devices, which, when in looking position, prevent any change in adjustment, the power being applied thru friction wheels which slip when the resistance is excessive and therefore relieve the locking devices and table adjusting connections from excessive strain.

Further objects of my invention are to provide means whereby the power applying connections may be readily and quickly withdrawn from the table adjusting levers to permit the removal or replacement of saws, and then replaced in operative relation to such lovers; to provide means whereby both the locking devices, and the power controlling device, may be simultaneously held in a desired position by a single operator, or the locking devices secured in a retracted position pending the operation of the power transmitting connections; and to provide means, whereby the power for adjusting the table and its associated parts may be derived from the overhead feeding conveyor and motion transmitted at a reduced speed suitable to the desired purpose.

In the drawings r Fig. 1 is a side elevation of a re-sawing machine embodying my invention.

Fig. 2 is a plan view of the table and its associated feeding conveyor, partially broken away to show the associated cross lever for lifting the table, fragments of the saw being also illustrated.

. Fig. 3 is a sectional view drawn generally on line 33 of Fig. 2.

Fig. 4 is a view in front elevation of my improved mechanism for actuating the table adjusting lever, the fragment of the table and feeding conveyors being shown in associated relation.

Fig. 5 is a sectional view drawn on line 5-5 of Fig. 1.

Like parts are identified by the same reference characters thruout the several views.

In its general organization the re-sawing machine illustrated in the drawings conforms to established practice. The work A. is delivered to the saw over the rollers 1 and between a set of feeding conveyors. The lower feeding conveyor comprises a set of sprocket chains 2 provided with cross slats or bars 3. It travels over a table 4 having notches 5 therein to receive the sprocket chains 2 whereby the bars 8 may bear upon the table in a horizontal position while travcling across it. The side margins of the table are connected with slides 6 which are guided by the frame member 7 when the table is to be raised and lowered, by means of a table supporting lever 8 centrally pivoted to the table at 9.

One end of the lever 8 is fulcrumed to a bearing member 10 carried by the adjusting screw 11. The other end of the lever is loosely engaged in a stirrup 12 which is pivoted at 14 to a table adjusting lever 13. The latter is fulcrumed or pivoted to the fram at 15 and is locked in its various positions of adjustment by latch bars 17 (one on each side of the lever), each of which is adapted to engage a notched segment 18 from which it may be retracted by a handle 19. The segments 18 are ofcourse secured to the frame of the machine.

The movements of the table are slight, but accuracy of table adjustment is important and it is also necessary that the rollers 1 over which the work is fed to the table conveyor should be such as to hold the work at the exact level at which the work supporting surfaces of the slats 3 travel. The same is true ofthe rollers 20 over which the work passes from the table. The adjustment of the table determines the thickness of the board to be out by the band saw 22.

To raise or lower the rollers 1 and 20 simultaneously with the table adjustment, motion is transmitted from the lever 13 to these rollers thru the link rod 24., lever 25, link 26, bell crank 27, connecting bar 28,

bell cranks 29, rods 30, and bell cranks 31, the latter supporting the rollers 1 and 20. The shaft 32 upon which lever is fulcrumed oscillates with the lever movement and transmits motion to the opposite side of the table where a duplicate set of bell cranks and their connections are located. It is therefore obvious that anymovement of the lever 13 will be simultaneously transmitted to the table and to all of therollers 1, and

20 to raise or lower them in unison. The

connections aresuch that thes movements of, the table and rollers will be exactly, equal and their horizontal position maintained. In this application, the parts above .described may be assumed to be old except as to the latch, bars 17, segments 18 and levers 19, which are describedfand claimed in, a separate application bearing even date herewith and filed by me concurrentlyl ;But the above description is deemed necessary to a clear disclosure of my invention in its combination therewith and to fully exshafts or trunnions which are journaled directly in suitable bearings in the bracket members, but the roller 41 has itss'haft or,

trunnions 44 joarnale'd i a forked or slotted lever 45 and the roller 42 has its shaiit or trunnions 46 journaled in a forked or slotted lever 47. The lever 451s pivoted to the frame at 48 near its upper end or ends. The lever 47 ispivotedtotheframe at 49 near its lower end or ends and the unpivoted :1 ends of the levers 45 and47 are linked to- ,gether by a connecting bar 50- suitably notched to receive the ends of the levers, The notches are of such dimensions as toallow an adjustment of the lever s therein by means of adjustingscrews52 which have swivel connection with the bar 50 and threaded connection with the levers OILViCG versa. i I I A vertically disposed bar 55 is detachably connected withthe table adjusting lever 13- 1 by a link 56 anda removable pin 57, normally heldin place by a swinging resilient arm- 58. The upper portion of thebar 55, passes between the rollers42 and 43 a etwe the rollers 40 and 41 but liorn'ially without pressure contact with' any of theserollers.

The rollers 40 and? 43 t? continuously driven from the shaft 60 by means ofja,

sprocket chain 61 and therefore inasmuch' as these rollers 40' and 43 arelocated arr op positesides of the bar 55, it is obvious that by pressing the bar 55 against the roller 40, it will be actuated in one direction, (upwardly), whereas if the bar is placed against roller '43Jit will be pushed downwardly, since both of the rollers 40 and 43 revolve in the same direction on opposite sides of the bar.

The bar 55 may be pressed against either of these actuating rollers 40 or 43 by means of the cooperating rollers 41 and 42, respectively', butjowi-ng to the cross connec-, tion of the levers 45 and 47, (bar 50), it is obviousthatthe'pressure engagement of the e altern te, a

A convenient means for actuating these rollers 41 and 42 is comprised in the horizontally swinging, 1nanually operated controlling lever 65 the motion of which is transmitted to the cross connection 50 thru its bellcrank arm 66, link 67 and a lever 68 rollers41 42 with the bar 55 must which is pivotally fulcrumed to the frame at 69 is obvious thatby moving the controlling lever 65 in one direc'ztion, the bar 50 will swing lever 45 towards the bar 55 and carry theroller41 into pressure relation with it, thuspushing the bar 55 against roller 40, whereup0ri the bar, the table ad justing lever 13 and all of the parts with which saidlever 13. is operatively connected will be simultaneously lowered.

7 While the roller 41 is thus being pressed against the bar 55, the roller 42 will of course be carried away from the bar whether in actual contact tl'ierewith or not atthebeginniiig of the movement, but when it 'is desired to lower the table and assoc i atedparts ,'t1j1 co trolling lever 65 will be swung in the opposite direction, thereby swinging lever 45 outwardly from the bar 55 and lever 47 inwardly toward the bar. This carries roller 41 away fromthe bar and; roller 42 into pressure contact therewith, pushing the bar against roller 43 on the downwardly moving side thereof. Therefore the bar 55 and table adjusting lever 13 will move upwardly. V

The latch bars 17 will of course be re tractedifrom their respective segments 18 during the table adjusting movements above described but the arrangement is such that these latch b ar's 17 maybe retracted with one hand by means of their operating handles 19, while the operator actuates the controlling lever 65, with the other hand. If desired, however, the operating handles 19 may be secured in theretracted position by ordinary'catches or dogs 70 pending an adjustmentof the table from one position to vanother V l i It is "frequently desirable to remove the saw22 and this must then be withdrawn forwardly from its-supporting pulleys for drums. If permanently--connected, the bar would preventthe saw from being wholly withdrawn and therefore the in or bolt 57 is made removable so that the ink 56 may be readily detached from the table adjusting lever 13, after which the controlling lever may be swung to a position for lifting the bar 55 and the latter will then be carried upwardly out of the way until the saw has been removed and replaced. The bar 55 will then be lowered and reengaged with the table adjustin lever 13. The pin 57 may normally be heTd in position by the swinging spring plate 58 which is adapted to be manually pushed to one side to allow the pin 57 to be withdrawn as above ex plained.

I claim:

1. The combination with the table adjusting lever of a re-sawing mechanism, of a bar operatively connected with said lever, two sets of opposed friction rollers between which said bar passes, power connections for driving one roller in each set to rotate them in the same direction, said power driven rollers being on opposite sides of the bar and each adapted to actuate the bar in a direction opposite to its movement when actuated by the other power driven roller, and a manually operable lever controlling the position of the other rollers of the respective sets to selectively press the bar against either of the power driven rollers.

2. The combination with the table adjusting lever of a re-sawing mechanism, of a vertically movable bar operatively connected with said lever, two sets of opposed friction rollers between which said bar passes, the manually operable lever having connections for actuating one roller of each set in the direction of its associated roller for pressure engagement of such rollers with the bar, and power driven connections for one roller of each set, the power driven rollers of the respective sets being adapted to actuate the bar in opposite directions.

3. The combination with the table adjusting lever of a re-sawing mechanism, of a vertically movable bar operatively connected with said lever, two sets of opposed friction rollers between which said bar passes, a manually operable lever having connections adapted to alternatively separate the rollers of one set while bringing those of the other set into pressure engagement with the bar, means for actuating a roller in one set to move the bar upwardly when in pressure engagement therewith, and means for actuating one roller of the other set to more the bar downwardly when in pressure engagement therewith.

4. The combination with the tabl'e adjusting lever of a re-sawing mechanism, of a vertically movable bar operatively connected with said lever, a set of normally separated opposed friction rollers for actuating said bar upwardly, another set of opposed fric= tion rollers for actuating the same down wardly, a manually operable lever for alter-- natively adjusting said sets of friction rollers into and out of pressure engagement with the bar, and co-operating manually adjustable means for locking the work table in a desired position of adjustment.

5. The combination with the table adjust ing lever of a resawing mechanism, of a vertically movable bar operatively connected with said lever, a set of normally separated opposed friction rollers for actuating said bar upwardly, another set of opposed friction rollers for actuating the same downwardly, a manually operable lever for alternatively adjusting said sets of friction rollers into and out of pressure engagement with the bar, and cooperating manually adjusting means for locking the work table in a desired position of adjustment, said locking means and manually operable lever being disposed for simultaneous operation by one person.

6. In a re-sawing machine having a saw operating horizontally above a work table, the combination with a friction bar and associated connections for varying the vertical distance between the saw and work table, of a set of power operated friction rollers adapted for pressure engagement with the bar to move it in one direction, another set of power operated friction rollers adapted for pressure engagement with the bar to move it in the opposite direction, and means for manually and alternatively controlling the operation of said sets of rollers upon the bar.

7. In a re-sawing machine, the combination with table adjusting mechanism, of two sets of friction rollers, a table actuating bar extending between the rollers of the re- SPTCtlVG sets, pivoted levers for actuating one roller of each set into and out of pressure engagement with said bar, a link connected to the levers of the respective rollers adapted to ensure their movement in alternation, means for adjusting the connection of said link with each lever to regulate the pressure of the associated roller upon said bar, a manually operable member for transmitting motion to said levers through their link connections, and power transmitting connections for actuating one roller of each set.

8. The combination with the work table of a resawing machine, of a table adjusting mechanism, manually controlled power connections for actuating the table adjusting mechanism, and means for locking the adjusting mechanism, and releasing the locking means with one hand while controlling the power connections with the other.

9. The combination with the work table of a resawing machine, of table adjusting ll ll mechanism, manually controlled power con- In testimony whereof I afiix my signature nections for actuating the table ad usting 1n the presence of two Witnesses. mechanism, and means for automatlcally stopping the motion of said table at a pre- JOHN SORENSON' 5 determined point, when said table is moved YVitnesses:

by said power connections, said last men- JNo. J. RnMo,

tioned means being manually controllable. B/LARIAN BOOTH. 

